<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>让渡</title>
    <script src="js/jquery-1.12.4.js"></script>
</head>
<body>

    <script type="text/javascript">
        $(function () {
            alert("jQuery");
        });

        var jq=jQuery.noConflict();

        jq(function () {
            alert("jQuery2");
        });

        //自执行匿名函数
        jQuery(function ($) {
           $(function () {
               alert("jQuery3");
           });
        });
    </script>

</body>
</html>